To better assist you with your request, I would recommend providing more information regarding the specific style or theme you prefer for the apartment's interior design. Some popular design styles include:
Modern
Contemporary
Scandinavian
Industrial
Farmhouse
Minimalist
Additionally, if you have any specific color preferences or musthave elements for the apartment's design, feel free to mention them.
Once I have a better understanding of your preferences, I would be happy to share some fullhouse renovation ideas and provide you with some visually appealing room layout options for your 66 square meter twobedroom, oneliving room apartment.